Recent Advances on Heterojunction‐Type Anode Materials for Lithium‐/Sodium‐Ion Batteries

Abstract

Rechargeable batteries are key in the field of electrochemical energy storage, and the development of advanced electrode materials is essential to meet the increasing demand of electrochemical energy storage devices with higher density of energy and power. Anode materials are the key components of batteries. However, the anode materials still suffer from several challenges such as low rate capability and poor cycling stability, limiting the development of high‐energy and high‐power batteries. In recent years, heterojunctions have received increasing attention from researchers as an emerging material, because the constructed heterostructures can significantly improve the rate capability and cycling stability of the materials. Although many research progress has been made in this field, it still lacks review articles that summarize this field in detail. Herein, this review presents the recent research progress of heterojunction‐type anode materials, focusing on the application of various types of heterojunctions in lithium/sodium‐ion batteries. Finally, the heterojunctions introduced in this review are summarized, and their future development is anticipated.

Optimization Strategies Toward Functional Sodium‐Ion Batteries

“…The built‐in electric field (due to the difference in bandgap and work function) is responsible for the acceleration of ion migration leading to better kinetics, and the chemically less reactive reaction intermediates formed at the junctions alleviate the volume change of active material. [ 71 ]…”

Synergistically Designed Dual Interfaces to Enhance the Electrochemical Performance of MoO2/MoS2 in Na‐ and Li‐Ion Batteries

“…[4,[7][8][9][10] Currently, a lot of efforts are being adopted to improve foregoing, such as nano-crystallization, [11,12] carbon compositing, [13,14] and construction of heterogeneous structure. [15,16] As an effective strategy to optimize the electrode performance, constructing heterojunction cannot only achieve the stable nanostructures by coupling different band gaps crystals but also enhance the electrochemical reaction kinetics by introducing built-in electric field at the heterogeneous interface. [10,[17][18][19] For instance, Mobased electrodes, i.e., MoO 2 /MoC, [10] Bi 2 S 3 /MoS 2 [17] MoS 2 /SnS, [7] and MoS 2 /NiS 2 [20] with heterojunctions have been reported for enhanced reaction kinetics and cycling stability.…”

A NiCoSex/CG heterostructure with strong interfacial interaction showing rapid diffusion kinetics as a flexible anode for high-rate sodium storage

“…At the same time, due to the chemical bonding force and electrostatic force between the heterojunction components, the material exhibits low volume expansion and a relatively stable structure. 30,31 As cobalt and nickel belong to the VIII A group, their structure and size are very close to each other, and they are easy to be doped with each other. Therefore, cobalt selenide and nickel selenide can form a unique heterojunction structure, thus improving the sodium storage performance.…”